Closed end cylindrical rotor valve



June 7, 19322. H. P, MacGREGOR 1,861,541

CLOSED END CYLINDRICAL ROTOR VALVE Filed May 20, 1929 2 Sheets-Sheet l 2:il z I9 5J` 12J fo f4 jzf-I @P17 /l www 9 22 HALQERT P. Mac CffqOR,

JMW Y' I+ JMW' Patented June 7, 1932 1,861,541A a' application ined myau, 1929. Vserial no. 364,350.'

This invention relates to valves and parvided through which extends thestem 7 of ticularly to lubricated valves. the rotating plug which iscomposed of ends It is an object of my invention provide 8 and/ 9 joinedtogether by the spaced veran unbalanced, lubricated valve in which ticalside walls 10 and 11 between which is the plug will be closedorsubstantially closed ya passageway 12 for the passage of line pres- 55l l at both ends, but means is provided eithel` sure or Huid. This pluis preferably cy- Aby reason of a. loose it or a passageway f'lindi'ical. Its lower en 9 normally rests through or around one end ofthe plug for upon a screw plug 13 threaded into the, casthe linepressure so that the plug will move ing 1. The upper end 8-is spacedfrom the in one direction only against thelubricaiit inside of thecoverportion of casingtoform o 1 in a lubricant chamber located adjacent thea, chamber 14 for lubrioant'whjch is sup.

other end of the plug causing that lubricant plied to the chamberthrough the lubricantf to travel from the chamber around the plug supplyfitting 15. Lubricant is distributed and around that end of the plug onwhich from this chamber through the vertical u such pressure is beingapplied on both sides. grooves 16 and the horizontal grooves 17 It is afurther object to provide a plug, partly surrounding the end 9 oftherotor. preferably of cylindrical form, which forms Surrounding the stein7 is a packing 18, a with the casing at the end of the plug, whichretaining cover 19 for the packing retained carries a plug stemextending out of the casin position by the bolts 20.

20 ling, a; .lubricant Chamber. The lille PreSSUIe It will be noted fromFig. 1 that the fit m, islitihzed to act upon the exposed face ofbetween the rotor and the casing is loose in the stem carrying end andupon both faces the sense that there is such suicient clearof the otherend of the plug thereby securing ance for the line pressure to workalong the the maximum of area. upon which the line sides of the rotorends 9 and beneath it so pressure can operate tomove the plug againstthat the line pressure will exert itself upon u the lubricant todistribute the lubricant makthe whole area of the bottom end 22 of theing the valve self-lubricated. rotor plug 9. This line pressure willalso Referring to the drawings: exert itself upon the underside 21 ofthe up- Fig. l is a section through the preferred per end 8 of therotor. As the stem 7 is ex- 3 form. The fit of the plug is exaggeratedin posed to the outside atmosphere, it is obvious order to show theloose character of the fit. that the higher line pressure acting uponthe Fig. 2 is a side elevation of the plug looksurface 2l will also tendto move the plug ing at the apertured side. vertically in cooperationwith the pressure Fig. 3 is a detail vertical section thereof the undersurface 22 of the lower end 9,

through on the line 3-3 of Fig. l. the pressure having worked beneaththe cas- 85 Fig. 4 is a horizontal section on the line ing and aroundsurface 23 of the lower end 9. 4.--4 of Fig. 2. Thus the line pressureis utilized to move Fig. 5 is a section through the valve showthe plugin one direction only against the ing a modification where the plug is atight single lubricant chamber 14 to force the lubri- 0 lit but isprovided with a center aperture cant therefrom through the lubricantdistri- 90 through one ond for admission of line presbution grooves.This prevents the valve from sure behind the plug. sticking whichfacilitates its rotation and n- Fig. 6 is a similar view showing apassage- Sures its lubrication. way for conveying line pressure throughthe Referring to Fig. 5, when it is desired to casing to a point behindthe plug. have a close fit between the plug and the cas- 95 Referring tothe drawings in detail, 1 is a ing, then a hole 24 may be drilledthrough the cylindrical casing having horizontally disbottom end 9 ofthe plug to admit pressure posed portions 2 and 3 with passageways 4 tothe surface 22 for the same purpose. and 5 therethrough for conveyingthe line In Fig. 6, a passageway 25 has been drilled uid or gas. Anapertured cover 6 is proto give access of the line pressure to the sur-100 face 22 of the lower end 9. In such case the lower end of the plugis provided with a series of spaced lugs which act as stops to preventthe rotor plug from sealing the by-pass port. These lugs 26 restV uponthe shoulder 27 of the screw plug 13.

It will be understood that I desire to comprehend within my inventionand within the scope of my claims such modifications as may be fairlycomprehended within such claims and invention due to necessarymodilications to adapt my invention to varying conditions of use and tovarying purposes.

I claim: v i

1. In a valve, a casing, a rotor plug having an aperture therethroughregistering wit inlet and exit apertures in the casing, said aperturebeing formed by a top, bottom and single side wall adaptedto close oneof the casing apertures there being a space between one end of said plugand said casing to form a lubricant chamber, said plug littingin saidcasing in such a manner that the line pressure will engage all sides ofthe plug except that forming one wall of the lubricant chamber wherebythe plug moves bodily toward the lubricant chamber and the line pressurepresses the sidewall of the plug adjacent the Casing surrounding theexit aperture therein. 2. In combination, a casing, a rotor plug thereinspaced from said casin at one end Y to form a lubricant chamber terebetween,

said plug being closed at both ends with one side cut away and somounted within said casin'g that the line pressure will act upon bothsides of one end and one side of the other end and the inside of the cutaway side.

3. In combination, a casing, a rotor plug therein spaced from saidcasing at one en to form a lubricant chamber therebetween, said plugbeing closed at both ends with a side cut away and so mounted withinsaid casing that the line pressure will act u on both sides of the oneend, one side of the ot er end and against the inside of the cut awaside, and a stem projecting from the other si e of last-mentioned end toa point outside of the casing.

4. In combination, a casing with inlet and outlet apertures, a rotorplug having a stem, spaced ends, one of which carries said stem, meansconnecting said ends forming a rotor side wall less than the diameter ofthe rotor to permit line pressure on the inside of the rotor when it isin closed position, said stem end being spaced from the casing to prm `alubricant chamber, the other end loosely .it-

ting in said casing so that line pressure may engage all sides and endsof the rotor eX- cept the portion forming a wall of the lubricantchamber and means for distributing lubricant from said chamber betweensaid casing and said rotor on the side adjacent the casing outletaperture when the rotor is in 55 closed position.

bottom of the rotating plug and the casing whereby line pressure willpass and move said plug bodily against the lubricant in said lubricantchamber for distributing it between the plug and said casing.

6. In combination, a casing with an inlet and outlet aperture, a plugloosely fitted therein having ends and a single side wall on one sideadapted to close the outlet aperture in the casing, one end of said plugbeing spaced from the casing to contain lubricant and meanscommunicating therewith for distributing lubricant therefrom between thecasing and the side walls ofthe rotor and about a portion of the otherend of the rotor adjacent the outlet aperture in the casing whereby linepressure will operate on the inside of the plug to move it against thelubricant and will move the plug against the casing toward the outletaperture so that line pressure may enter between the end of the lug awayfrom the outlet aperture to enter neath it.

7 In combination, a casing with an inlet and outlet aperture, acylindrical plug fitted thereinfor transverse and longitudinal movementof the plu comprising ends and a connecting side wal on one side of saidends, said casing and (plug being arranged to form between one enthereof a lubricant chamber, a stem on said plug extending out of saidcasin through said chamber.

8. n combination, a casing with an inlet and outlet aperture, acylindrical plug fitted therein for transverse and longitudinal movementof the plug comprising ends and a connecting side wall on one side ofsaid ends, said casing and (plug being arranged to form between one enthereof a lubricant chamber, a stem on said plug extendingout of saidcasing through said chamber, said casing having formed at its other enda space between the end of the plug and the casing into which linepressure can enter to move the plug against the lubricant in thelubricant chamber.

9. In combination, a casing having inlet and outlet apertures, anunbalanced rotor plug therein having spaced ends and a single connectingside wall on one side thereof loosely itted within said casing andhaving its ends spaced from the casing to form a lubricant chamber atone end and a pressure chamber at the other.

l0. .Tn combination, a casing having inlet and outlet apertures,anunbalanced rotor plug therein having spaced ends and a single conunecting side wall on one side thereof loosely fitted within said casingand having its ends spaced from the casing to form a lubricant chamberat one end and a pressure chamber at the. other, a stem mounted on thatend of the rotor plug which forms with the casing a lubricant chamber,said stem projecting out of the casing.

1l. In combination, a casing having inlet and outlet apertures, anunbalanced rotor plug therein having spaced ends and a single connectingside wall on one side thereof loosely fitted within said casing andhaving its ends spaced from the casing to form a lubricant chamber atone end and a pressure chamber at the other, a stem mounted on that endof the rotor plug which forms with the casing a lubricant chamber, saidstem projecting out of the casing, said plug n the casing having meansfor conveying lubricant from the lubricant chamber between the casingand the side wall of the plug and thence partially around the other endof the plug on the side toward the outlet aperture whereby the side ofsaid end of the plug away from said aperture will be free from lubricantto permit the entrance of line pressure behind that end of the lug tomove it against the lubricant in the lu ricant chamber.

In testimony whereof, I ax my signature.

HALBERT P. MAGGREGOR.

